TW538095B - Silicone composition and thermally conductive cured silicone product - Google Patents

Abstract

A silicone composition for preparing a cured silicone product, the composition comprising (A) an organopolysiloxane containing an average of at least two silicon-bonded alkenyl groups per molecule; (B) an organohydrogenpolysiloxane containing an average of at least two silicon-bonded hydrogen atoms per molecule in a concentration sufficient to cure the composition; (C) an alumina filler in a concentration sufficient to impart thermal conductivity to the cured silicone product; (D) an effective amount of a polyether; and (E) a catalytic amount of a hydrosilylation catalyst. A cured silicone product comprising a reaction product of the silicon composition.

Description

538095

FIELD OF THE INVENTION The present invention relates to a lion compound, and more particularly to an additive hard-cut compound containing an emulsified filler and w. The present invention also relates to the heat-conducting and hardening of the ketone composition. Plutonium products. Background of the invention

Due to its unique properties, silicone has been used for a long time, and the advantages of the negative group σ include high thermal stability, good moisture resistance, excellent flexibility, high ion purity, low-cardiac particle radiation, and a variety of The substrate is so pure that it can be used in many applications. For example, ㈣ series is widely used in automotive, electronics, construction, appliances, and the Pacific industry. Addition-hardenable silicon compositions are well known in the art and include organic polysiloxanes containing alkenyl groups, organohydrogenpolysiloxanes, alumina fillers, and hydrogenation catalysts. The description of this composition is in U.S. Patent No. 4,444,944 issued; U.S. Patent No. 5,008,3G7 issued to inomata; U.S. Patent No. 6, q25,435 issued to Yamakawa et al .; U.S. Patent issued to Nakano No. 6,169,142; and issued to the European Patent Office No. 496419. However, conventional silicone compositions containing alumina fillers exhibit little or no contact. I: H makes them unsuitable for certain applications, such as the necessity of forming lithopone to form a specific electronic package over a very defined area of a substrate. Under the shearing conditions encountered in general applications, the viscous silicone PSA composition clearly exhibits a ‘trend on the divider or coating device surface, forming a continuous adhesive line between the device and the coating. This condition causes contamination of the substrate. Moreover, viscous silicone compositions generally have a lower dispersion rate than compositions having a medium or low viscosity. On the other hand, the low-viscosity silicone composition has a sag or flow -4-This paper size applies the Chinese National Standard (CNS) A4 specification (210X 297 mm) 538095 A7 _ _B7 5 7 Description of the invention (2 ~) ^ ' The tendency to cross the initial limit of the coating. In addition, fairly thick films cannot be easily made from low viscosity shredded compositions in single-person coatings. Although silicas with a surface area such as smoked or fumed silica are generally added to silicone compositions to increase thixotropy, adding a very small amount of silica to a silicone composition containing an alumina filler may increase the viscosity significantly and be accompanied by Reduced dispersion rate. Therefore, there is a need for a thixotropic addition-hardenable silicone composition that can be hardened to form a thermally conductive silicone product. SUMMARY OF THE INVENTION The present invention has discovered that addition-hardenable silicone compositions containing alumina fillers and polyethers have unexpectedly high thixotropic properties. In particular, the present invention relates to a lithoxone composition for preparing a hardened lithoxone product, the composition comprising: (A) an organic polysiloxane, which contains at least two silicon bonds per molecule on average Alkenyl; (B) an organohydrogenpolysiloxane having a concentration sufficient to harden the composition, which contains at least two silicon-bonded hydrogen atoms per molecule on average; (C) a concentration sufficient to impart a hardened silane The product's thermally conductive alumina filler; (D) an effective amount of polyether; and (E) a catalytic amount of a hydrosilylation catalyst. The invention also relates to a hardened silicone product comprising the reaction product of the above composition. The present invention also relates to a multi-part silicone composition for preparing a hardened silicone product. The composition comprises two or more parts of the components (A) to (E). CNS) A4 specification (210 X 297 mm) 538095 A7 B7 V. Description of the invention

Provided that the components (A), (B), and (E) do not exist in the same number of parts. The lithone composition of the present invention has many advantages, including adjustable thixotropy, low VOC (organic compound) content, and adjustable hardening. Moreover, the silicone composition hardens to form a ketal product having excellent thermal conductivity. The silicon class composition of the present invention is particularly useful for filling a gap between a heat sink and an electronic device or for attaching a heat sink to an electronic device. Silicone compositions can also be used in packaged coils in power transformers and rectifiers. These and other features, characteristics, and advantages of the present invention can be better understood by referring to the following description and the scope of the appended patent applications. DETAILED DESCRIPTION OF THE INVENTION The silicone composition of the present invention is "thixotropic, or" thixotropic, "meaning that the composition exhibits a decrease in viscosity upon application of shear and a subsequent increase in viscosity upon standing 0 as used herein The term "thixotropic index" is defined as the ratio of the viscosity of the lithone ketone composition at a shear rate of 0 0 1 ra (j / sec to the viscosity of the composition at a shear rate of 0 1 ra (j / sec, where The viscosities are measured at 23 ± 2 ° C. The present invention relates to a silicone composition for preparing a hardened silicone product, the composition comprising: (A) an organic polysiloxane, each of which The molecule contains, on average, at least two silicon-bonded diluent groups; (B) — organic hydrogen polysilicon oxide having a concentration sufficient to harden the composition, each molecule containing at least two silicon-bonded hydrogen atoms on average; ( C) An aerated aluminum filler with a concentration sufficient to impart thermal conductivity to the hardened silane product; -6-This paper size applies Chinese National Standard (CNS) A4 regulations; 297 mm ^ --- ___ 538095 A7 B7 V. Description of the invention ( 4) "-(D) an effective amount of polyether; and (E) a catalytic amount of a hydrosilylation catalyst. The component (A), which is also equivalent to a "polymer", is at least one organic polysiloxane, which contains, on average, at least two alkenyl groups bonded to silicon per molecule. This organic polysiloxane may have a linearity Through branching or resin structure. The organic polyoxoxane may be a homopolymer or a copolymer. The alkenyl group generally has from 2 to about 10 carbon atoms, and examples include, but are not limited to, vinyl, Allyl, butylene and hexenyl. The alkenyl group in the organopolysiloxane can be located at the terminal, side chain, or end and side chain positions. The remaining organic groups in the organopolysiloxane are bonded to the silicon independently. Is selected from monovalent hydrocarbons and monovalent hydrocarbon groups without aliphatic unsaturation. These monovalent groups generally have from 1 to about 20 carbon atoms, preferably from 1 to 10 carbon atoms, and examples include, But not limited to alkyl such as methyl, ethyl, propyl, pentyl, octyl, undecyl and octadecyl; cycloalkyl such as cyclohexyl; aryl such as phenyl, fluorenyl, xylene Radicals, benzyl and 2-phenethyl; and halogenated hydrocarbon radicals such as 3,3,3 · trifluoropropyl, 3-aminopropyl and difluorobenzene The organopolysiloxane is preferably at least 50%, preferably at least 800/0. The organic group without aliphatic unsaturation is methyl. The viscosity of the organopolysiloxane at 25 ° C depends on the molecular weight. And structural changes, it is generally from 0.005 to 100 Pa.s, preferably from 0.05 to 50 Pa.s and particularly preferably from 0.05 to 5 Pa.s. According to the present invention, better organic polysilicon Oxane is a polydiorganosiloxane having an exemplary formula, in which each ... is independently selected from monovalent hydrocarbons and monovalent hydrocarbon groups as defined above without aliphatic unsaturation; R2 is as defined above Alkenyl, subscript & has a value, which

538095 A7 B7 can make the viscosity of polydiorganosiloxane at 25 ° C from 0.05 to 100 Pa.s. Preferably, R1 is a fluorenyl group and R2 is a vinyl group. Examples of organopolysiloxanes that can be used in the ketone composition include, but are not limited to, polydiorganosiloxanes having the following illustrative formulas: ViMe2SiO (Me2SiO) aSiMe2Vi, ViMe2SiO (Me2SiO) 0.25a (MePhSiO) .75aSiMe2Vi, ViMe2SiO (Me2SiO) 0.95a (Ph2SiO) 0.05aSiMe2Vi, ViMe2SiO (Me2SiO) 0.98a (MeViSiO) 0.02aSiMe2Vi-

Hold

MesSiOWejiCOwdMeViSiGOo.osaSiMes and

PhMeViSiO (Me2SiO) aSiPhMeVi, in which Me, Vi and Ph are respectively nail-based, ethyl-based, and base-based 'subscript a are as defined above. Methods for preparing polydiorganosiloxanes suitable for use in silicone compositions, such as those corresponding to the hydrolysis and condensation of organic silanes or the balance of cyclic polydiorganosiloxanes, are well known in the art.

The organopolysiloxanes that can be used in silicone compositions also include organopolysiloxane resins, which are essentially composed of R ^ SiOw units (M units) and Si04 / 2 units (Q units), of which R3 is independently selected from monovalent hydrocarbons and monovalent hydrocarbon groups, and the molar ratio of R ^ SiOm units to SiCU / 2 units in the resin is from 0.6 to 1.9. The monovalent group represented by R3 generally has from i to about 20 carbon atoms, and preferably has from 1 to about 10 carbon atoms. Examples of monovalent radicals include, but are not limited to, alkanes such as fluorenyl, ethyl, propyl, pentyl, octyl, undecyl, and octadecyl; cycloalkyl groups such as cyclohexyl; divalent groups such as vinyl, Propyl, butylene and hexenyl; aryl such as phenyl, tolyl, xylyl, methylol and 2-phenethyl; and halogenated hydrocarbons such as 3,3,3-trifluoropropyl, -Gas propyl and -8- This paper size applies to Chinese National Standard (CNS) A4 (210 X 297 mm) 538095 A7 _____B7 V. Description of the invention (6) " ~~ '---- Diphenyl . Of the organic polyoxysilane resins, it is preferred that at least two or eighteenth of the carbamide resins be substantially all R3 groups to be fluorenyl groups. ^ Less Preferably, the organopolysiloxane resin contains an average of from about 3 to 30 mole% alkenyl groups. The percentage of moles of feminine in the resin is defined herein as the ratio of the moles of feminine-containing siloxane units in the resin to the total moles of the siloxane units in the resin multiplied by 100. 'A specific example of the organic polysiloxane resin is a kind of resin (which is essentially composed of CHfCHKCH ^ SK ^ 2 units, (CH3) 3Si〇i / 2 units, and si〇w units, where CH2 = The molar ratio of the combined CH (CH3) 2SiOl / 2 unit and (CH3) 3Si〇i / 2 unit to the SiOw unit is about 〇7. The organic polysiloxane resin is obtained by a method known in the art. Manufactured. Preferably, the resin is prepared by treating a resin copolymer with at least one alkenyl-containing terminal protecting agent, wherein the resin copolymer is prepared by the silica hydrosol coating procedure of Daudt et al. Daudt The method of et al. Is disclosed in U.S. Patent No. 2,676,182, which is incorporated herein by reference to teach how to make an organic polysiloxane resin suitable for use in a silicone composition. Briefly, Daudt et al. The method includes reacting a silica hydrosol with a hydrolyzable triorganosilane, such as trimethylsilylsilane, a siloxane, such as hexamethyldisoxaxane, or a mixture thereof under acidic conditions and recovering a copolymer having M and Q units. The resulting copolymer generally contains from about 2 to about 5 weight percent Hydroxyl. Organic polysiloxane resins with a hydroxyl group content of less than 2% by weight are based on the products of Daudt et al. And the amount is sufficient to provide the final product from 3 to 30 mol% of alkenyl-containing alkenyl group. End protector or a mixture of an end protector containing an alkenyl group and an end protector without aliphatic saturation. The end of this paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 538095

Examples of protective agents include, but are not limited to, silazane, siloxane, and silane. Suitable. The last known tincture is technically well-known and issued to U.S. Patent No. 4,584,355 to BHzzard et al .; U.S. Patent No. 4,591,622 to Bhzzard et al. And issued to H () man et al. U.S. Patent No., please incorporate this by reference. A single end-protection agent or a mixture of such agents can be used to prepare an organic oxo resin. > The knife (A) may be a single organic polysiloxane or a compound containing two or more organic polysiloxanes. In this mixture, at least one of the following organic polysiloxanes has different properties. # ·· Structure, viscosity 'average molecular weight, siloxane units and order. (B), which is also quite a "crosslinking agent" here, is at least one kind of organic hydrogen polylithic milk, which contains an average of at least two hydrogen atoms with money in each molecule. The average number of alkenyl groups per molecule in (A) "is the sum of the average number of hydrogen atoms bonded to fluorene per molecule of scoring towels. It is two or four times larger. Hydrogen atoms bonded to Shi Xi in organic hydrogen polylithic sintering Can be located on the end, side chain, or end and side chain position. ::: Glucosane can be a homopolymer or copolymer. Organohydrogenpolysiloxane m: linear, branched, cyclic, or resin Examples of crushed oxygen firing that may be present in organic " V rolling include, but are not limited to, HR42Si〇1 / 2, ^ 3S, o1 / 2. Hr ^ 1〇2 / 2, =-each R heart is as above As defined and exemplified by ingredient (A), independently unsaturated monovalent hydrocarbons and monoship hydrocarbon groups. Organic nitrogen has at least 5G% of the organic group in the muffin is methyl. Examples of organic lice polysiloxanes include , But not limited to a tertiary silyl-10-

538095

Oxypoly (methylhydroxanthine), Terminated with trifyl oxypoly (dimethyl oxyhydroxanthine / methylhydroxanthine), and dimethylhydroxanthine at the end Poly (Methyl Hydrogen Siloxane) is not known as dimethylhydroxanthoxy, and polydimethylxanthine is essentially composed of H (CH3) 2Si〇1 / 2 units and Si〇4 / 2 Unit made of resin. Ingredient (B) may be a single organohydrogenpolysiloxane or a mixture containing two or more organohydrogenpolysiloxanes. In this mixture, each organohydrogenpolysiloxane has at least one of the following properties. Structure, Viscosity, average molecular weight, siloxane units and order. The concentration of component (B) in the silicone composition is sufficient to harden (crosslink) the composition. The actual amount of the component (B) depends on the degree of hardening required, which generally depends on the ratio of the mole number of hydrogen atoms bonded to silicon in the 7 blade (B) to the alkenyl mole number in the component (A). Increase. Generally, the concentration of the component (B) is sufficient to provide 0.3 to 5 silicon-bonded hydrogen atoms per alkenyl group of the component (A). Preferably, the concentration of component (B) is sufficient to provide component (A) from 0.3 to 2 silicon-bonded nitrogen atoms per alkenyl group. Methods for preparing linear, branched and cyclic organohydrogenpolysiloxanes such as organic, stone sintered, hydrolyzed and condensed are well known in the art. The method for preparing the organohydrogen polysiloxane resin is also well known as exemplified in U.S. Patent No. 5,31,843; U.S. Patent No. 4,370'358 and U.S. Patent No. 4,707,531. . In order to ensure the mutual compatibility of the components (eight) and (B), the main organic groups in each component are preferably the same. Preferably this group is methyl. Ingredient (C) is an alumina (alumina) filler. The alumina filler contains alumina with a general particle size from 0.2 to 150 nanometers, preferably from 02 to 20 micrometers.-This paper is a national standard (CNS) A4 size (21GX297 public love) 538095 A7 ---- B7 V. Description of the Invention (9) "-Particles. Preferably, the alumina filler contains fumed alumina, α_Αΐ203. The oxide filler can be a treated oxide filler, which is prepared by treating the surface of the oxide particles with an organic stone compound. The organic stone compound can be any organic stone compound commonly used for processing stone stone fillers. Examples of organic stone compounds include, but are not limited to, organic gas silanes such as methyltrifluorosilane, dimethyldichlorite and stilbene monochlorite, and organic stone oxidants, such as terminally protected by radical Polymers of dimethylsiloxanes, hexaroyldisilanes and tetramethyldivinyldisilanes; organosilanes such as hexamethyldisilanes, hexamethylcyclotrisilamine Alkane; and organic alkoxysilanes such as methyltrimethoxysilane, ethylenetrioxane: ethoxyl, vinyltriethoxy residue, 3_glycidyloxy ^ dimethoxysilane and 3-methacryloxy Propyltrimethoxysilane. Although the shape of alumina particles is not standard, spherical particles are preferred because they generally increase the viscosity of silicone compositions by a smaller amount than particles with other shapes. The component (C) may be a single alumina filler as described above or a mixture of two or more such fillers, in which at least one of each filler is different in the following properties: surface area, surface treatment, particle size, density, and particle shape. The concentration of component (c) in the silicone composition of the present invention is sufficient to impart thermal conductivity to the silicone product formed by hardening the compound. The concentration of ingredient (c) is such that the 2 hardened silicone product has a heat conductivity g of generally at least 0.8 w / mK, preferably at least i 5, wherein the heat conductivity is measured using the method described in the following examples. The actual concentration of component (C) depends on the required thermal properties, the surface area of one of the fillers, the density of the filler, the shape of the filler particles, the surface treatment of the filler, and the properties of the other components in the silicone composition. Take the total of silicone composition -12-

538095 A7 B7 V. Description of the invention (1Q) Weight is the basis. The concentration of component (C) is generally from about 60 to about 90% by weight, preferably from about 70 to about 85% by weight. When the concentration of the component (C) is less than about 60% by weight, the hardened silicone product does not have significant thermal conductivity. When the degree of the component ((:)> is greater than about 90% by weight, the 'Shixiyu' composition has a very high viscosity and can harden to form a fragile product. An alumina filler suitable for use in the silicone composition of the present invention is prepared The methods are well known in the art; many of these fillers are commercially available. As stated above, the oxide fillers of the present invention can be prepared by treating the surface of alumina particles with at least one organosilicon compound. Alumina filler. In this example, the particles can be treated before mixing with the components of other silicone compositions or the particles can be treated simultaneously during the preparation of the silicone composition. Ingredient (D) is at least A polyether. The polyether can be a polymer, homopolymer or copolymer, such as a post copolymer or a graft copolymer. In addition, the structure of the polyscale can be linear, branched or cyclic. _ Is a polyepoxy or polyorganosiloxane-polyalkylene oxide copolymer. Examples of polyepoxy include, but are not limited to, poly (ethylene oxide) with the general formula R50 (CH2CH20) bR5, The general formula is R5〇 [CH2CH (CH3) 〇] bR5 (Propylene oxide), a general formula of 11:) 0 ((^ 2 (1:15 ((1; 112〇 ^ 3) 0) 1311), a poly (butylene oxide) and general formula of R) 0 (CH2CH20) c- [CH2CH (CH3) 0) dR5 poly (butylene oxide), where each R5 is independent hydrogen, R6 or -C (= 0) -R6, where R6 is a monovalent hydrocarbon or a monovalent marginalized The hydrocarbon group, b has a value such that the average molecular weight of the polyepoxide is from about 1,000 to about 35,000, and c + d = b; and a cyclic polyepoxide. -13- This paper size is applicable to China National Standard (CNS) A4 specification (210 X 297 public love) ~ " " " "

Pretend

538095 A7

The monovalent group represented by R generally has from i to about 20 carbon atoms, and preferably has from 1 to about 10 carbon atoms. Examples of monovalent groups include, but are not limited to, alkyl groups such as fluorenyl, ethyl, propyl, pentyl, octyl, undecyl, and octadecyl; cycloalkyl such as cyclohexyl; alkenyl such as vinyl , Allyl, butenyl, and hexenyl; aryl groups such as phenyl, fluorenyl, diphenylphenyl 'benzyl and 2-phenethyl ·, and halogenated hydrocarbon groups such as 3,3,3_tri Fluoropropyl, 3-chloropropyl and dioxophenyl. Specific examples of polyalkylene oxide include, but are not limited to, poly (ethylene glycol), poly (propylene glycol), poly (fluorenhydrofuran), and ether and ester derivatives thereof such as monofluorenyl ether, difluorenyl ether And diacetates; [C America sells Tween's poly (ethylene oxide) sorbitan ester series; and Uni0n sells TERGITOLNP's nonphenyl poly (ethylene glycol) ester series. ♦ Organic silicone-polyalkylene oxide copolymer, also equivalent to the technical "silicone polyether, generally has a polysiloxane main chain and side chain and / or terminal polyether groups. But, polysiloxane The ether copolymer may have an "inverted," structure, wherein the copolymer has a polyether backbone and side chains and / or terminal polysiloxy groups. The polysiloxane and polyether groups in the silicone polyether may have a branched or unbranched structure. Polyorganosiloxane-polyalkylene oxide copolymers are "hydrolyzable, or" non-hydrolyzable. In the hydrolyzable polyorganosiloxane-polyalkylene oxide, the polyether group is connected to the silicone via a hydrolytically unstable silicon-fluorene-carbon (Si-o-c) linking group. In the non-water-soluble polyorganosiloxane-polyalkylene oxide, the polyether group is connected to the silicone via a stable silicon-carbon (Si_c) bond on hydrolysis.

The polyalkylene oxide in σ polyorganic stone oxy-fired-polyalkylene oxide generally contains alkylene oxide units such as ethylene oxide units (_CH2CH20-), propylene oxide units (-CH2CH: 297 mm) -14 -538095

(Called) 〇-) and & Ru Ding Shao units (Yun Yang Yang ^ namely 〇 ·). The polyalkylene oxide group may include a single-type alkylene oxide unit or two or more different units, such as a combination of ethylene oxide level and fluorene unit. According to a preferred embodiment of the present invention, the polyorganic stone oxy-fired polyepoxy-fired copolymer has the following general formula: R8R72SiO (R72SiO) e (R9R7Si〇) fSiR7 ^ R8 wherein each R7 is a monovalent hydrocarbon group, and R8 is R7 or R9, R9 are polyalkylene oxides having the general formula selected from: -R10 (OCH2CH2) g〇R11 ^ -R10 (OCH2CH2) h (OCH2CH (CH3)) iOR11 where R1Q is from 2 to 20 carbons An atomic divalent hydrocarbon group; r " is selected from hydrogen, an alkyl group having 1 to 4 carbon atoms, and a fluorenyl group having 2 to 6 carbon atoms; e has a value from 8 to 25 and f has one From bucket to% value, g has a value from 5 to 60, h + 1 = gih / l = 〇5::!. Preferably, the monovalent hydrocarbon group represented by R has from i to 12 carbon atoms. Examples of monovalent hydrocarbon groups represented by R7 include, but are not limited to, alkyl groups such as methyl, ethyl, propyl, butyl, and octyl; cycloalkyl groups such as cyclopentane and cyclohexyl; alkenyl groups such as vinyl and allyl , Butenyl and hexenyl; and aryl such as phenyl, fluorenyl, benzyl and tolyl. Based on the availability of the starting materials, the monovalent hydrocarbon groups represented by R7 are preferably all methyl groups. Preferably, the divalent hydrocarbon group represented by R1G $ has from 3 to 6 carbon atoms. Examples of the divalent hydrocarbon group represented by R10 include, but are not limited to, a group having the formula: -CH2CH2CH ^-, -CH2CH2CH2CH2-, -CH2CH (CH3)-, -CH2CH (CH3) CH2-, and -CH2CH2CH2CH2CH2-. Preferably, the divalent hydrocarbon group represented by RiCV / f has the formula -15- The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) A7 B7 5. The invention description (13) is -ch2ch2ch2-. Specific examples of the organosiloxane-polyalkylene oxide copolymer are provided in the following Examples section. The method for preparing the polyorganic stone oxy-oxygen compound-polyepoxy sintered copolymer is technically known as, for example, U.S. Patent No. 4,122, ㈣. For example, polyorganosynxane-polyalkylene oxide copolymers can utilize a hydrosilylation reaction to utilize polydiorganosiloxanes containing hydrogen atoms bonded to silicon in the presence of platinum-group catalysts. Saturated polyalkylene oxide reaction. Alternatively, polyorganosiloxane-polyalkylene oxide copolymers can be nucleophilic displacement reactions, such as polydiorganosiloxane containing a silicon-bonded _ alkyl such as -CH2C1 in a hydrogen scavenger. It is prepared by reacting with a polyalkylene oxide containing a hydroxyl group in the presence. The polyorganosiloxane-polyalkylene oxide copolymer can also be obtained by condensation reaction, for example, a polydiorganosiloxane containing a hydrolyzable group bonded to a silicon and a polyalkylene oxide containing a hydroxyl group. Examples of hydrolyzable groups include, but are not limited to, hydrogen, hydroxyl, alkoxy such as methoxy, ethoxy, and isopropoxy; halogen groups such as fluorine, gas, bromine, and fluorene; amino groups such as N-fluorene Ethyl ethyl amine; moonyl such as ethyl ethyl ketone rib; amine oxygen such as diethyl amine oxy; and ethyl alcohol such as ethyl ethyl and propyl ethyl. Ingredient (D) is present in the silicone composition in an effective amount. The term "effective amount" as used herein means that the concentration of ingredient (D) results in the silicone composition having better thixotropy than a silicone-like composition lacking only a polyether. Generally speaking, the ingredients The concentration of (D) can improve the thixotropic index of the silicone composition by at least about 25 //, where the thixotropic index is measured using the method in the following example. Cheng-16- This paper scale applies to China Standard (CNS) A4 size (210 X 297 mm) The concentration of (D) is generally from about 0.05 to about 2% by weight, preferably from about ο. 1 to 1% by weight. The total weight is based. When the concentration of the component (D) is less than about 0.05% by weight, the silicone composition generally cannot exhibit or improve thixotropy. When the concentration of the component (D) is more than about 2% by weight, the thixotropy Only little additional improvement. The effective amount of component (D) can be measured by routine experiments using the method in the following examples. Component (E) is a hydrosilylation that promotes the addition reaction of components (A) and (B) Catalysts. Hydrosilylation catalysts can be any well-known hydrosilane containing platinum group metals. Catalysts, compounds containing platinum group metals, or catalysts containing microencapsulated surface group metals. Platinum group metals include platinum, rhodium, ruthenium, palladium, iron, and indium. It is preferred that the platinum group metal is platinum. High reactivity in hydrosilylation reactions. Preferred hydrosilylation catalysts include complexes of gas platinum and specific organosiloxanes containing vinyl groups as disclosed in US Patent No. 3,419,593, which is incorporated by reference. The method is incorporated in this case. A better catalyst of this type is the reaction product of air platinum acid and 1,3-divinyl-m3, fluorenyl disilaxane. Hydrosilylation catalysts can also contain microencapsulation A platinum group metal catalyst, the platinum group metal contained in 1 is encapsulated in a thermoplastic resin. The composition containing the micro / encapsulated hydrogen silane catalyst has a longer period under ambient conditions, usually several months. Or longer, and it hardens relatively quickly at a temperature higher than the melting point or softening point of the thermoplastic resin. Microencapsulated hydrogen silane catalysts and methods for their production are well known in the art, such as U.S. Patent No. 4,766, No. 176 and references cited therein; and United States Lee No. 5,017,654. 538095 A7 B7 V. Description of the invention (15) The concentration of component (E) is sufficient to catalyze the addition reaction of components (A) and (B). Generally speaking, the concentration of component (E) is sufficient to provide from ^ 丨 to ⑺㈧ppm platinum group metals, preferably from 1 to 500 ppm platinum group metals, more preferably from 5 to 150 ppm platinum group metals, based on the combined weight of components (A), (B) and (C) as Benchmark. When the platinum group metal contains I below 0.1 ppm, the hardening rate is very slow. The use of more than 1,000 ppm platinum group metals causes no significant increase in the hardening rate and is therefore uneconomical. The silicone composition may additionally contain at least one Hydrosilylation catalyst inhibitors. The mixture of (A), (B), (C), (D) and (E) can begin to harden at ambient temperature. In order to obtain a longer working time or "pot life" at room temperature, the catalyst's ambient / tongue properties can be prevented or suppressed by adding a suitable inhibitor to the lithone composition. Suitable inhibitors include various "alkynes", systems such as 3-fluorenyl_3-pentene_1-alkyne and 3,5-diamidino-3-hexene-1-blocks; fast alcohols such as 3 , 5-Difluorenyl q _hexyne-3-ol, 1-acetylene- 丨 -cyclohexanol, and 2-phenyl_3 • butyne_2_ol; maleate and fumarate, such as The well-known dialkyl, dienyl and dialkoxyalkyl fumarates and maleates; and cyclovinylsiloxanes. In the silicone composition, 'alkyne alcohols constitute a type of Good inhibitor. Generally speaking, the concentration of the inhibitor in the silicone composition of the present invention is sufficient to provide a "pot life" of at least one hour at room temperature. This concentration will depend on the specific inhibitor used, the hydrosilation reaction The properties and concentrations of the media and the properties of the organohydrogenpolysiloxanes vary widely. In some cases, inhibitor concentrations as low as 1 mole inhibitor / molle platinum group metal will be satisfactory. Storage stability and hardening rate. In other examples, concentrations of up to 500 or more Moore inhibitors / Mole platinum group metals may be required. Optimal for a particular inhibitor in a given silicone composition. 538095 A7

Concentrations can be easily measured using routine experiments. ㈣ The composition may further include at least one kind of adhesion promoter, which makes the stone ketone composition on a substrate used in the structure of ordinary electronic devices; for example, stone XI; passive coatings such as dioxide and nitride Glass; metals, such as steel and gold; ceramics; and organic resins such as polyimide and epoxy resins produce strong non-original diamonds. This adhesion promoter can be in any general addition-hardened silicone composition. The viscosity promoter used. Preferred adhesion promoters include mixing at least one polysiloxane having at least one silicon-bonded alkenyl group and at least one silicon-bonded hydroxyl group per molecule with at least one epoxy-functionalized alkoxysilane. The obtained viscosity promoter. The polysiloxane generally has less than about 15 silicon atoms per molecule, and preferably the mother and child 77 have 3 to about 15 stone atoms. The dilute base in polyoxygen fires generally has 2 to about 6 carbon atoms. Examples of alkenyl include, but are not limited to, vinyl, allyl, and hexenyl. The preferred alkenyl group is ethylene. The remaining silicon-bonded organic groups in the polysiloxane are independently selected from alkyl and phenyl. Alkyl groups generally have less than about 7 carbon atoms. Suitable alkyl groups are exemplified by fluorenyl, ethyl, propyl, and butyl ', but are not limited thereto. A preferred alkyl group is fluorenyl. The silicon-bonded vial group and the alkenyl bond with the stone-bond group in the oxylithic sintering can be located at the terminal, side chain, or terminal and side chain positions. The polysiloxane may be a homopolymer or a copolymer. The structure of polyoxoxane is generally linear or branched. The units of polyoxane in polysiloxane can include H0R122Si01 / 2, Ri2 (CH2 = CH) Si02 / 2, R122Si02 / 2, C6H5Si03 / 2, R12 (C6H5) Si02 / 2, (C6H5) 2Si02 / 2, (C6H5) (CH2 = CH) Si02 / 2, (CH2 = CH) R122Si01 / 2, and (HO) (C6H5) R12 ^^ R12 is an alkyl group having less than about 7 carbon atoms as exemplified above. Best -19- This paper size applies to China National Standard (CNS) A4 (210 X 297 mm)

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V. Description of the invention (17) Permanganene is a polyorganosiloxane containing methyl vinyl siloxane units and having a hydroxyl group at the end. Such polysiloxanes and methods for making them are well known in the art. The epoxy-functional alkoxysilane includes at least one epoxy-functional organic group and at least one silicon-bonded alkoxy group. The structure of epoxy-functional silicon oxide silicon oxide is generally linear or branched. The alkoxy groups in epoxy-functionalized oxysilanes generally have less than about 5 carbon atoms and can be exemplified by methoxy, ethoxy, propoxy, and butoxy, with methoxy being the better Alkoxy. Preferably, the epoxy-functionalized organic group has an illustrative formula selected from the group consisting of: 0 y p, och2ch—ch2-\ / ^ ~ CH2aV, ^ CUCn2OCH2CUCR2〇 (CH ^) r,

Wherein each Y is an alkyl group having 1 or 2 carbon atoms independently; j is 0, 1 or 2; k and m are each 0 or 1; and R13 is a divalent hydrocarbon group having no more than 12 carbon atoms. Preferably, Rn is selected from the group consisting of a saturated aliphatic hydrocarbon group, an arylene group, and a divalent group of the formula -Ri4 (〇Rr4) nOR14, wherein R14 is a divalent saturated aliphatic hydrocarbon group having 1 to 6 carbon atoms and η has A value from 0 to 8. This paper size applies Chinese National Standard (CNS) A4 specification (210 X 297 mm) 538095 A7 B7 V. Description of the invention (18) " Residual and silicon-bonded organic radicals in epoxy-functionalized alkoxysilanes Independently selected from monovalent hydrocarbon groups having less than 7 carbon atoms and fluorinated alkyl groups having less than about 7 carbon atoms. Examples of the monovalent hydrocarbon group are alkyl groups such as fluorenyl, ethyl, propyl, and hexyl; alkenyl groups such as ethylene and allyl groups; and aryl groups such as phenyl groups. Examples of suitable fluorinated alkyls include, but are not limited to, 3,3,3-trifluoropropyl, perfluoroethyl) ethyl and β- (perfluoropropyl) ethyl. The preferred epoxy-functionalized burned oxygen burner is a mono-oxyl tri-burner stone burner. Examples of epoxy-functionalized alkoxysilanes include 3-glycidoxypropyltrioxosilane, epoxy-4- (2_trioxosilaneethyl) cyclohexane, and 1,2-cyclo Oxy-2-fluorenyl-4- (1 • fluorenyl-2-trioxoethoxylate ethyl) cyclohexyl. The preparation of such silanes is well known in the art. The two components of the above-mentioned viscosity promoter can be directly mixed together or added to the Shixi composition or separately. Generally speaking, the relative amount of polyoxysilane and silicon fire can be adjusted to provide 1 mole of silane for each mole of alcohol in polylithic fire. The aforementioned types of viscosity promoters are disclosed in U.S. Patent No. 4,087,585 'which is incorporated herein by reference to teach viscosity promoters suitable for use in silicone compositions. It is preferred that the polyoxycarbamate be mixed with an epoxy-functional alkoxysilane before adding to the composition. It is preferred that the polysiloxane and the silane react at a higher temperature. Organic, oxane and silane can be reacted by a method known as silane alcohol-containing organic stone sintering and oxysilane burning. This reaction is usually completed in the presence of a test catalyst. Examples of suitable catalysts include, but are not limited to, metal hydroxides, alkali metal alkoxides, and alkali metal silicates. -21-This paper size applies Chinese National Standard (CNS) A4 specifications (210 X 297 male ‘]-

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Fortunately, this reaction is accomplished by using epoxy-functionalized alkylene groups of about mol ratio and silicon-bonded hydroxyl groups in polysiloxane. Polysilicone: and Shixiyan can be reacted in the absence of diluent or in an inert organic solvent such as toluene. The reaction is preferably completed at a relatively high temperature, for example, 15 ° C. ^ Better adhesion promoters also include at least one oxygen compound: an organic five stone eve AMe2Si (〇Me2Si) 3OSiR154.p (〇R ^) pt having the formula: where A is hydrogen or an aliphatic unsaturated monovalent hydrocarbon group, Rls is an alkyl group, and p is an integer from 2 to 4. Examples of the aliphatic unsaturated monovalent hydrocarbon group represented by A include, but are not limited to, vinyl, allyl, butenyl, hexenyl, and isopropenyl. Based on the availability and cost of the starting material, A is preferably a hydrogen atom or a vinyl group. The alkyl group represented by Rls generally has 1 to about 6 carbon atoms, and preferably has 1 to 3 carbon atoms. Examples of suitable alkyl groups include, but are not limited to, fluorenyl, ethyl, propyl, butyl, pentyl, and hexyl. An alkyl group containing at least 3 carbon atoms may have a t-cut or unbranched structure. Based on the availability and cost of the starting material, R15 is preferably amidino or ethyl. Organic pentasiloxanes can be prepared by reacting hexamethylcyclotrisiloxane with an organic silane having the formula AMe2Six to produce a four-stone oxybinder having the formula AMe2Si (OMe2Si) 3X ^ where A is defined above and X is halogen. Tetrasilicone is then hydrolyzed to produce an α-hydroxytetrasilicone compound having the formula AMe2Si (OMe2Si) 3OH, where A is as defined above. α-Hydroxytetrasiloxane is reacted with R1YpSi (〇R15) P, wherein R15 and p are as defined above. -22- This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) binding

538095

DESCRIPTION OF THE INVENTION A specific example of an organic pentasiloxane is 1-vinyl-9,9,9-trimethoxyoctamethylpentasiloxane with the formula viM ^ si〇 (Me2Si〇hSi (〇Me) 3, where vi is ethanoyl 'Me is methyl. In silicone compositions containing microencapsulated hydrosilylation catalysts, this type of organic pentasiloxane is particularly preferred. It is important that organic pentasiloxane is in ambient conditions Microencapsulated catalysts do not cause silicone dissociation. Moreover, the organic pentamethylene oxide described above exhibits excellent adhesion to metals commonly used in the manufacture of electronic devices. The above-mentioned viscosity promoters are disclosed in US Patent No. 5 No. 194,649 is incorporated herein by reference to teach a viscosity promoter suitable for use in silicone compositions. The concentration of the viscosity promoter in the silicone composition is sufficient to make the composition suitable for substrates such as these The substrates cited above have viscosity. The viscosity can vary in a wide range with the properties of the adhesion promoter, the type of substrate, and the required adhesive bond strength. The concentration of the adhesion promoter is generally from 0.001 to about 10% by weight, based on the total weight of the composition. The optimum concentration of the agent can be easily measured using routine experiments. The silicone composition can be a single-part array composition containing single-part ingredients (A) to (E), or two or more parts ( A) to (E) multiple parts of the composition, provided that the components (A), (B), and (E) do not exist in the same parts. For example, the multi-part silicone composition may contain a part containing the ingredients (A), some ingredients (c), some ingredients (D) —and the first part of all ingredients (E) and the remaining ingredients (A), (C) and (D) and all ingredients @) Of the second. The single-part silicone composition is generally combined with the specified proportions of the components (A) to (E) with or without the help of organic solvents at ambient temperature and any option: -23- I Home Standard (CNS) A4 Specifications_> <297 Public Love) &quot; ~~ &quot; ----------

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The composition of the wound was made. Although the order of adding the various ingredients is not standard, if the silicone composition is intended to be used immediately, the hydrosilylation catalyst should preferably end up at less than about 30. 0 ° C to prevent premature hardening of the composition. Moreover, multiple portions of the silicone composition can be prepared by combining the specified ingredients specified in each portion. Mixing can be done in a batch or continuous process by any technique known in the art such as milling, blending and stirring. The particular device is determined by the viscosity of the ingredients and the viscosity of the final silicon dioxide composition. Silicone compositions can be coated on a wide variety of substrates, including but not limited to metals such as aluminum, gold, silver, tin-lead, nickel, copper and iron, and alloys thereof; silicon; fluorocarbon polymers such as polytetramethylene Fluoroethylene and polyvinyl fluoride; Polyamines such as Nylon; Polyimide; Epoxy; Polyester; Ceramics; In addition, the silicone composition of the present invention may be coated on a substrate by any suitable means such as spraying, syringe dispersion, screen or stencil printing, or ink nozzle printing. A hardened silicone product according to the present invention comprises a reaction product of a silicone composition containing the above-mentioned ingredients (A) to (E). The silicone composition may be hardened at a temperature of from about room temperature to about 200 ° C, preferably from about 80 to about 180 ° C and particularly preferably from about 100 to about 150 ° C. time. For example, the silicone composition can harden in less than about 24 hours at room temperature and less than about 1 hour at 100 ° C. The silicone composition of the present invention has many advantages, including adjustable thixotropy, low VOC (Sexual organic compounds) content and adjustable hardening. In addition, the lithophane composition of the present invention hardens to form a silicone product with excellent thermal conductivity. The thixotropic properties of the silicone composition of the present invention can be customarily selected by appropriate selection. The type and content of the ether are adjusted. Due to its thixotropy, the silicone composition can be used. -24- This paper size applies Chinese National Standard (CNS) A4 specifications (210X 297 mm) 538095 A7 — — — B7 V. Description of the invention (22) Coating on various substrates with equipment. In particular, the silicone composition of the present invention can be coated by stencil printing. Furthermore, once coated, the silicon composition exhibits excellent dimensional stability and will not Causes sag or flow.

In addition, the system composition of the present invention does not require an organic solvent for many applications and has a very low VOC content. Therefore, the silicone composition of the present invention can avoid the health, safety and environmental hazards associated with the solvent-containing silicone composition. Moreover, the solvent-free composition of the present invention generally undergoes less shrinkage during hardening than a solvent-containing silicone composition. Moreover, the silicone composition of the present invention can be rapidly hardened at a temperature ranging from room temperature to a moderately high temperature without noticeable by-product formation. In fact, the hardening rate of the silicone composition is customarily adjusted by adjusting the concentration of the catalyst and / or the inhibitor as appropriate. The silicone composition of the present invention is particularly useful for filling a gap between a heat sink and an electronic device or for attaching the heat sink to an electronic device. Silicone compositions can also be used in packaged coils in power transformers and rectifiers. Examples

The following examples are presented to further illustrate the silicone composition of the present invention, but are not to be considered as limiting the present invention, which are described within the scope of the attached patent application. Unless otherwise indicated, parts and percentages listed in all examples are based on weight. The following methods and materials are used in the examples. The thixotropic index and viscosity of the silicone composition were measured using a Rheometdcs ARES SLCII parallel plate galvanometer equipped with a 25 cm thin plate. The thixotropic circuit test controlled in advance is 23 ± 2. (: The following operation is performed using the tension control mode at a shear rate increased from 0.0 to 10.0 rad / s. The thixotropic index listed is shear -25- This paper size applies to China National Standard (CNS) A4 specifications (210 X 297 mm) 538095 A7 B7 V. Description of the Invention The viscosity ratio of the silicone composition at a shear rate of 0,0 1 rad / s relative to the viscosity of the composition at a shear rate of 0.1 rad / s. Listed The viscosity is at a shear rate of 10 rad / s. Hardened silicone test samples for thermal conductivity and hardness measurement are prepared as follows. The silicone composition is poured into an aluminum weighing pan, and then at 100 Harden at t for 1 hour. Use a punch to remove a dish-shaped sample with a diameter of about 2.5 cm and a thickness of about 1.6 cm. The thermal conductivity of the hardened silicone product can be measured using a Mathis hot dish thermal analyzer. This measurement Based on 60 Hz line frequency, 0.25 watts of power for 5 seconds, and 3.3 cm of probe's transient planar technology. The listed thermal conductivity values are described in watts per meter (W / mK) The hardness of the hardened silicone product is measured using a Shore 00 instrument. The listed hardness Degree values are the median values of five measurements made at different locations of the same sample. Polymer A: Polydioxosiloxy with a viscosity of about 0.45 Pa.s at 25 ° C and a dioxoethoxysilane end Polymer B: Polydimethylsiloxane with a viscosity of about 0.065 Pa · s at 25 ° C and a dimethylethylene silyloxy terminal at the end. Crosslinking agent: 3 difluorinated silicon per molecule on average Poly (difluorenylsiloxane / methylhydrosiloxane) at the end of the oxane unit and 5 fluorenylhydroxanthane units with trifluorenylsilyloxy. Filler A: average particle size is 14 microns The calcined and ground alumina is sold under the name RMA325 by Alcan Chemicals Europe (Fife, Scotland). Filler B: Distributable calcined alumina with an average particle size of 0.4 microns, which is -26 -This paper size is applicable to SS Standard (CNS) A4 (2ιOX 297), 538095 A7 B7 V. Description of Invention (24) 'It is sold by Alcoa (Bauxite, Arkansas) under the name A_ 1000 SGD. Inhibitor: 3,5-dimethyl-1-hexyn-3-ol. Catalyst: from 1% 1,1-divinyl-1,1,3,3-tetramethyldisilazol A mixture of platinum (IV) complex, 92% polymer A and 7% tetramethyldivinyl disiloxane. Pigment: composed of 6% carbon black, 82% polymer A and 12% zinc oxide Shixi 8¾Matrix A: Shixione is first polymerized in a Baker Perkins sigma blade mixer with 98.98 parts of methyltrioxosilane, 7.59 parts of polymer a and 7.59 parts of polymer. Compound B was prepared by mixing for 5 minutes. Filler A (50.08 parts) and 3 3.28 parts of filler B were added to the mixture in small portions in this order. The mixture was then heated under vacuum (10 kP a) at 150 ° C for 1 to 2 hours to remove volatile materials. After the mixture was cooled to room temperature, 0.35 parts of catalyst and 0.13 parts of pigment were added to the mixture. Lithium ketone matrix B: Lithium ketone matrix is firstly mixed with 98.98 parts of methyltrioxosilane, 7.59 parts of polymer a and 7.59 parts of polymer B in a Baker Perkins sigma blade mixer. Prepared by mixing for 5 minutes. Filler A (50.07 parts) and 33.28 parts of filler B were sequentially added to the mixture in small portions. The mixture was then heated in a vacuum (10 kPa) at 150 ° C for 1 to 2 hours to remove volatile materials. After the mixture was cooled to room temperature, 0.35 parts of the catalyst, o.i 3 parts of the cosmetic residue: and 0.01 parts of the inhibitor were added to the mixture. Surfactant A: Silicone polysurfactant with a viscosity of 1700 cm2 / s at 25 ° C, which is made by Dow Corning (Midland, MI) and Air -27- This paper is in accordance with Chinese national standards (CNS ) A4 size (210 x 297 mm) 538095 A7 B7 Five invention descriptions (25)

Products (Allentown, PA) are sold under the names DC 198 surfactant and DABC DC 198 surfactant, respectively. The surfactant includes a silicone polyether copolymer having a weight average molecular weight of 2,786 and having the following average indicative formula:

Me3SiO (Me2SiO) x (MeSiO) ySiMe3 CH2CH2CH2 (OCH2CH2) m [OCH2CH (CH3)] n〇COCH3

It is assumed that the average values of x, y, m, and η are 108, 10, 18, and 18, respectively. Surfactant B: Silicone polyether surfactant with a viscosity of 2,000 cm2 / s at 25 ° C, which is divided by Dow Corning (Midland, MI) and Air Products (Allentown, PA). 4 DC5247 interface Active agents and DABCO DC5247 surfactants are sold. The surfactant includes a silicone polyether copolymer having a weight average molecular weight of 26,347 and having the following average indicative formula:

Mc3SiO (Me2SiO) x (MeSiO) ySiMe3ίκ

: 2CH2CH2 (OC &amp; CH2) m [OCH2CH (CH3)] n〇H Order

The average of x, y, m, and η is 108, 10, 18, and 18, respectively. Surfactant C: Silicone polyether surfactant with a viscosity of 875 cm2 / s at 25 ° C. It is made by Dow Corning (Midland, MI) and Air Products (Allentown? PA) with DC5125 surfactant. And DABCO DC5 125 surfactant. The surfactant contains a silicone polyether copolymer having a weight average molecular weight of 43,402 and having the following average indicative formula: -28- This paper size applies to Chinese National Standard (CNS) A4 (210X297 mm) 538095 A7 B7 V. Description of Invention (26

Me3SiO (Me2SiO) x (MeSiO) ySiMc3 where each R is independently a polyether group having the formula:-(CH2) 3 (OCH2CH2) m [〇CH2CH (CH3)] nOCOCH3 (a) or-(CH2) 3 ( 〇CH2CH2) 0〇CHCH3 (b) where the average values of x, y, m, η, and 〇 are 169, 23, 18, 18, and 12, respectively. Surfactant D: Silicone polyether surfactant with a viscosity of 1845 cm2 / s at 25 ° C, which is sold by Air Products (Allentown, PA) under the name of DABCO DC5950 surfactant. The surfactant contains a silicone polyether copolymer having the following average illustrative formula: Me3SiO (Me2SiO) x (Me〒iO) ySiMe3 R wherein each R is a polyether group independently having the following formula: (CH2) 3 (〇CH2CH2) m [OCH2CH (CH3)] nOC〇CH3 (a) or-(CH2) 3 (〇CH2CH2) 0 [OCH2CH (CH3)] pOCOCH3 (b) where X, y, m, η, ο, and p The averages are 60.4, 7.6, 30, 30, 12 and 1 $, respectively. Surfactant E: 25. (: Silicone polyether surfactant with a viscosity of 650 square centimeters per second, which is made by Dow Corning (Midland, MI) and Air -29-This paper size applies to China National Standard (CNS) A4 specifications (210 x 297 mm) 538095 A7 B7 V. Description of the invention (27

Products (Allentown? PA) are sold under the names DC5188 Surfactant and DABCO DC5188 Surfactant. The surfactant comprises a silicone polyether copolymer having the following average indicative formula:

Me3SiG (Me2SiO) x (MeSiO) ySiMe3 CH2CH2CH2 (OCH2CH2) m [OCH2CH (CH3)] nCOCO3 where the average values of x, y, m and η are 93, 6, 21 and 21, respectively. Surfactant F: 25 Lithone ketone polyether surfactant with a viscosity of 425 square centimeters per second, which is made by Dow Corning Company (Midland, MI) and Air 卩 1: 〇 (111 (^ (八 1411 切1111? 八) are sold under the names of 0 (: 193 surfactant and 0/8 (: 0 DC 193 surfactant). The surfactant contains a weight average molecular weight of 3,129 and has the following average properties. Silicone polyether copolymer:

Me3Si〇 (Me2SiO) x (McSiO) ySiMe3 CH2CH2CH2 (0CH2CH2) m0H where the average values of x, y, and m are 8.7, 3.7, and 12, respectively. Comparative Example 1 A silicone composition was prepared by combining 99.98 parts of Silicone Matrix A and 0.02 parts of an inhibitor. The mixture was blended using an AM 501 Hauschild dental mixer set at high speed for 25 seconds, and then mixed by hand with a spatula for 60 seconds. The viscosity and thixotropic index of the composition are shown in Table 1. Example la-i In Example 1 a_i, the surfactant a was added to -30 in a continuous portion. This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 538095 A7 B7 V. DESCRIPTION OF THE INVENTION (28) The silicone composition according to Example 1 was used to produce a series of compositions having the surfactant concentrations shown in Table 1. After each addition, the mixture was blended for 25 seconds using an AM 501 Hauschild dental mixer set at high speed, and then blended by hand with a spatula for 60 seconds. The viscosity and thixotropic index of each composition are shown in Table 1. Example 2 A silicone composition was prepared by first combining 99.84 parts of a silicone matrix a, 0.01 parts of an inhibitor, and 0.15 parts of a surfactant B. The mixture was blended using an AM 501 Hauschild dental mixer set at high speed for 25 seconds, and then mixed by hand with a spatula for 60 seconds. The viscosity and thixotropic index of the composition are shown in Table 1. Examples 3a-b In Example 3a, the silicone composition was prepared by combining 99.87 parts of matrix A, 0.01 parts of inhibitor, and 0.11 part of surfactant c. The mixture was blended using an AM 501 Hauschild dental mixer set at high speed for 25 seconds, and then mixed by hand with a spatula for 60 seconds. In Example 3b, 0.14 parts of the surfactant c was added to the syringone composition of Example 3a. The mixture was then blended as described above. The viscosity and thixotropic index of each composition are shown in Table 1. Example 4 Shi Xi_Composition was prepared by combining 99.83 parts of matrix a, 0.01 parts of inhibitor and 0.16 parts of surfactant D first. The mixture was blended using an AM 501 Hauschild dental mixer set at high speed for 25 seconds, and then mixed by hand with a spatula for 60 seconds. The viscosity and thixotropic index of the composition are shown in Table 1. Example 5a-b -31 _ This paper size applies Chinese National Standard (CNS) A4 (210 X 297 mm) &quot; 538095 A7 B7 V. Description of the invention (29) In Example 5a, the silicone composition was borrowed It is prepared by combining 99.75 parts of Matrix A, 0.01 parts of Inhibitor and 0.23 parts of Surfactant E. The mixture was blended using an AM 501 Hauschild dental mixer set at high speed for 25 seconds, and then mixed by hand with a spatula for 60 seconds. In Example 5b, 0.2 1 part of the surfactant E was added to the syringone composition of Example 3a. The mixture was then blended as described above. The viscosity and thixotropic index of each composition are shown in Table 1. Installation Example The silicone composition was prepared by combining 99.85 parts of Matrix A, 0.01 parts of Inhibitor and 0.14 parts of Surfactant F first. The mixture was blended using an AM 501 Hauschild dental mixer set at high speed for 25 seconds, and then mixed by hand with a spatula for 60 seconds. The viscosity and thixotropic index of the composition are shown in Table 1. Comparative Example 2

The silicone composition was prepared by combining 99.42 parts of silicone matrix B and 0.28 parts of a crosslinking agent. The mixture was blended using an AM 501 Hauschild dental mixer set at high speed for 25 seconds, and then mixed by hand with a spatula for 60 seconds. The viscosity and thixotropic index of the composition are shown in Table 1. Example 7 A silicone composition was prepared by combining 99.42 parts of silicone base B, 0.2 8 parts of cross-linking agent, and 0.30 parts of surfactant A. The mixture was blended using an AM 501 Hauschild dental mixer set at high speed for 25 seconds, and then mixed by hand with a spatula for 60 seconds. The viscosity and thixotropic index of the composition are shown in Table 1. 0-32- This paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm) 538095 A7 B7 V. Description of the invention (3Q) Table 1 Example Silicone Copolymer Polyether Weight% Viscosity (Pa-s) Thixotropic Index Control 1--20.2 2.4 la A 0.02 36.6 2.0 lb A 0.07 264.3 3.5 lc A 0.11 564.9 7.7 Id A 0.2 767.6 9.5 le A 0.3 1371.6 12.5 If A 0.6 2372.0 13.3 ig A 0.9 2819.6 11.4 lh A 1.2 3242.4 11.5 li A 1.5 2577.4 10.7 2 B 0.15 451.5 5.3 3a C 0.11 190.5 3.5 3b C 0.25 463.5 5.7 4 D 0.16 325.2 4.9 5a E 0.23 228.7 5.1 5b E 0.44 755.1 11.8 6 F 0.14 447.4 6.3 Contrast 2-21.0 1.5 7 A 0.30 455.7 4.8 -33- This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) 538095 A7 B7

Comparative Example 3 The silicone composition was made by combining 99.7 1 part of a silicone base b and 0.29 parts of a parental combination. The mixture was blended using an AM 501 Hauschild dental mixer set at high speed for 25 seconds, and then mixed by hand with a spatula for 60 seconds. Table 2 shows the thermal conductivity and hardness of the hardened stone ketone product. Example 8 A silicone composition was prepared by combining 99.71 parts of a silicone base B, 0.29 parts of a cross-linking agent, and 0.01 part of a surfactant A. The mixture was blended using an AM 501 Hauschild dental mixer set at high speed for 25 seconds, and then mixed by hand with a spatula for 60 seconds. The thermal conductivity and hardness of the hardened silicone product are shown in Table 2. Example 9 The silicone composition was prepared by the method of Example 8 and according to the following component concentrations: 99.71 parts of silicone matrix B, 0.29 parts of cross-linking agent, and 0.06 parts of surfactant A. The thermal conductivity and hardness of the hardened lithone product are shown in Table 2. Example 10 The silicone composition was prepared by the method of Example 8 and according to the following ingredient concentrations: 99.71 parts of Matrix B, 0.29 parts of cross-linking agent, and 0.7 parts of surfactant A. The thermal conductivity and hardness of the hardened silicone product are shown in Table 2. Example 11 The silicone composition was prepared by using the method of Example 8 and according to the following ingredients: 7 degree of nutrient: 99.71 parts of matrix B, 0.29 parts of cross-linking agent, and 0. 15 parts of the boundary

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This paper size applies to Chinese National Standard (CNS) A4 specifications (210 X 297 mm) 538095 A7 B7 5. Description of the invention (32) Surfactant A. The thermal conductivity and hardness of the hardened silicone product are shown in Table 2. Example 12 The Shixi copper composition was prepared by using the method of Example 8 and according to the following component concentrations: 99.71 parts of matrix b, 029 parts of cross-linking agent, and 30 parts of surfactant A. The thermal conductivity and hardness of the hardened lithone product are shown in Table 2. Example 13 The Shixiyu composition was prepared by the method of Example 8 and according to the following component concentrations: 99.71 parts of matrix b, 029 parts of cross-linking agent, and 0.61 parts of surfactant A. The thermal conductivity and hardness of the hardened silicone product are shown in Table 2. Example 14 Shi Xi_ The composition was prepared by using the method of Example 8 and according to the following ingredient concentrations: 99.71 parts of matrix b, 29 parts of cross-linking agent, and 0.91 parts of surfactant A. The thermal conductivity and hardness of the hardened stone eve product are shown in Table 2. Example 15 A lithone composition was prepared according to the method of Example 8 in accordance with the following component concentrations: 99.71 parts of Matrix B, 0.29 parts of cross-linking agent, and L 20 parts of Surfactant A. The thermal conductivity and hardness of the hardened silicone product are shown in Table 2. Example 16 The silicone composition was prepared in accordance with the method of Example 8 and according to the following component concentrations. The paper size was adapted to Chinese National Standard (CNS) A4 specifications (210 X 297 mm) -35- 538095 A7 B7 V. Description of the invention (33) Obtain: 99.71 parts of matrix B, 0.29 parts of cross-linking agent, and 1.53 parts of surfactant A. The thermal conductivity and hardness of the hardened silicone product are shown in Table 2. Table 2 Example Silicone Polyether Copolymer Weight% Thermal Conductivity (W / mK) Hardness (Shore 00) Control 3--1.642 75 8 A 0.01 1.587 77 9 A 0.06 1.585 76 10 A 0.11 1.644 75 11 A 0.15 1.610 76 12 A 0.30 1.642 75 13 A 0.61 1.627 72 14 A 0.90 1.592 79 15 A 1.19 1.618 77 16 A 1.51 1.584 77 -36- This paper size applies to China National Standard (CNS) A4 (210 X 297 mm)

Claims (1)

538095 .- A kind of osmium composition for the preparation of hardened lithone product, the composition is characterized by: (A) an organic polysiloxane, which contains at least two silicon-bonded compounds per molecule on average Dilute base;, jin (^) an organic hydrogen polysiloxane that is hard enough to harden the composition, each knife contains at least two hydrogen atoms bonded to silicon on average; (C) a concentration sufficient to impart a hardened silane The product's thermally conductive alumina filler; (D) an effective amount of a polyether; and (E) a catalytic amount of a hydrosilication catalyst. 2 The composition according to item 1 of the patent application range, wherein the alumina filler comprises alumina particles having an average particle diameter of from 0.2 to 20 m. 3. The composition according to item 1 or 2 of the scope of patent application, wherein the oxide filler comprises calcined alumina. 4. The composition according to item 1 or 2 of the scope of patent application, wherein the alumina filler is prepared by treating the surface of alumina particles with an organic silicon compound. 5. The composition according to item 1 or 2 of the scope of patent application, wherein the concentration of component (c) is from 70 to 85% by weight based on the total weight of the composition. 6. The composition according to item 1 or 2 of the scope of patent application, wherein the polyether is selected from a polyalkylene oxide and a polyorganosiloxane-polyalkylene oxide copolymer. 7. According to the application, the composition of the patent scope item 6, wherein the polyalkylene oxide has an illustrative formula selected from the following formula: R50 (CH2CH2〇) bR5, -R50 [CH2CH (CH3) 0] bR) , R5〇 (CH2CH (CH2CH3) 〇) bR5 and R 0 (CH2CH20-) c [CH2CH (CH3) 0] dR5, where each R5 is independent -37- This paper standard applies to China National Standard (CNS) A4 specifications ( 210 X 297 Public Director) 538095 AB c D VI. Patent application scope Nitrogen, ^^ 弋 (= 〇) 礅 6, where R6 is a monovalent hydrocarbon or a monovalent hydrocarbyl group having an average molecular weight of the polyalkylene oxide from a value of # 1000 ' And c + d = b. 8. The composition of claim 6 in which the polyorganosiloxane-polyalkylene oxide copolymer has the following general formula: R8R72SiO (R72SiO) e (R9R7SiO) fSiR72R8 wherein each R7 is a monovalent hydrocarbon group, and R8 is R7 * R9, R9 is a polyalkylene oxide selected from the group consisting of: -R10 (〇CH2CH2) g〇Ru and -R10 (OCH2CH2) h (OCH2CH (CH3)) i〇R11 where RiG is A divalent hydrocarbon group of 2 to 20 carbon atoms; Rn is selected from hydrogen, an alkyl group having 1 to 4 carbon atoms, and a fluorenyl group having 2 to 6 carbon atoms; e has a value from 8 to 250, f has a value from 4 to 50, g has a value from 5 to 60, h + i = g and h / i = 0.5: 1 to 2: 1. 9. A hardened silicone product comprising the reaction product of a composition in scope i or 2 of the patent application. 10. A composition that can be used to prepare a hardened silicone product according to item 1 or 2 of the scope of the patent application, wherein the composition is stored in multiple portions and the components (A), (B) and (E) ) Does not exist in the same number of copies. 38-1 Paper Size Applicable to China National Standard (CNS) A4 (210 X 297 mm) '' ''